Grating for prison windows, cells, or the like



March 2 1926 .A. P. KELLER ET AL GRA'IING FOR PRISON WINDOWS, CELLS, OR THE LIKE I 7 2 Sheets-Sheet Filed Jan. 23, 1922 INVENTORS m w 2 al 6. 5 1%. AJ m0 3,

. Ma .7 ATTORNEYS.

March 2 1926.

- 1,575,343 A. P. KELLER ET AL GRATING FOR PRISON WINDOWS CELLS, OR THE LIKE Filed Jan; 23, 1922' 2 SheetS -Sheet 2 INVENTORJ AJD. .Kelder, J. 1/. Sch/Le r'et'lu, J1-

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{7 M ATTORNEYS.

4 Patented Mar. 2, 1926.

UNITED STATES 1,575,343 PATENT OFFICE.

.ANfDfB-EW I. KELLER AND JOHN V. SCI-ILERETH, JR, OF TIFFIN, OHIO.

GRA'IING FOR PRISON WINDOWS, CELLS, OR THE ITEM.

Application filed January 23, 1922. Serial No. 531,251.

T 0 all whom it may concern:

Be it known that we, ANDREW P. KELLER and JOHN V. ,SoHLERiYrn, Jr., citizens of the United States, residing at Tiffin, in the county of Seneca and State of Ohio, have invented certain new and useful Improveneither ingress or egress can be had through the grating without detection. 1

A further object ofthe invention is to rovide a ating wherein bending of the ars thereo or attempt to'saw through said able annunciator.

And the invention has as a still further object to provide a grating which will be well adapted for eneral use.

v 25' Other and inci ental objects will appear hereinafter.

In the drawing: I Figure 1 is a fragmentary elevation showing our improved grating in connection with a prison wlndow.

Figure 2 is a detail sectional view taken through one of the bars of the rating,

Figure 3 isa fra entary e evation partly-broken away an shown in section, this 'view illustrating the annunciator and annunciator box employed, 7

Figure 4 is a vertical sectional view showing a modified form of annuneiator box employed, and j Figure 5 is a sectional view taken at rlght angles to Figure 4.

Referring now more particularly to the drawing, we have for convenience, shown our-improved grating in connection with a prison: window. An ordinary. wall is illustrated at 10 and formed in said wall is a window 11 having a sill 12. In carrying the ranged to extend through the sill 12 and are firmly connected to a conduit 15 embed ded in the wall 10. The bars as well as said conduit are, of course, formed of metal and extending through'the conduit is a conductor 16. This conductor is insulated from the conduit by a plurality of insulatmg rings 17 surrounding the conductor, these rings being formed of any approved dielectric material and serving to center the conductor with respect to the conduit. Extending from the conductor within the bars 14 are branch conductors 18. These branch conductors are insulated from the bars by suitable insulating rings -19 centering the branch conductors with respect to the bars, the rings 19 being similar to the rings 17, At their lower ends, the branch conductors are, soldered or otherwise effectively secured to the conductor 16.

An annuneiator casing or box 20 is 'employed, this box being preferably formed of connected to the remaining post of the an- "nunciator while the other lead from the batteries is connected to the conduit 15. The

annunciator box will, of course, be arranged at some place accessible only to the warden of the prison or other authorized person.

As will now be readily understood in View of the preceding description, attempt to spread the bars 14 will result in bending the bars into engagement with the branch con- As shown in Figure 3 of theductors 18, thus grounding said conductors and closing the circuit through the annunciator 22 so that a warning signal willbe sounded. Similarly, attempt to saw through the bars will result in sounding of the annunciator. Should the cross rods 13 be severed or otherwise released, the bars 14 I will, nevertheless, still obstruct the window sill 12. Such bending of the bars will, of course, result in closing the circuit through the annunciator. We accordingly rovide a apart by spacing strips 26 interposed be tween the walls, the strips being formed of any suitable insulating material. Hinged upon the box body is a door 27 which, like the box body, is also formed of spaced inner and outer walls held apart by spacing strips 28 interposed therebetween, thestrips 28 being similar to thestri s 26. As will be observed, the inner wall 0 the door is arranged to abut the free edges of the inner wall of the box body while the outer. wall of the door is arranged to abut the free edges of the outer Wall of the box body. Projectmg from the outer wall of the box body is a contact 29 and mounted upon the inner wall of the door is a s ringcontact 30 disposed to en gage at its ree end with the contact 29 when the door is opened. Leading. into the box body through the outer wall thereof is a conduit 31 corresponding. to the conduit 15 of the preferred construction and extending within said conduit through the inner wall of the box body is a conductor 32 corresponding to the conductor 16 of the referred construction, the conductor 32 being electrically connected with said inner wall of the box bodybut being insulated from the conduit by lnsulating rings 33 corresponding to therings 17 of the preferred construction. Arranged within the box body is a lining 34 of suitable insulating material and extending from the outer wall of the box body through a suitable opening in the inner wall thereof and through said lining'is a bindin wall 0 the box body is a similar binding post 36. Secured within the box body and suitably insulated therefrom is an annunciator, as conventionally shown at 37, one terminal of which is connected with the binding post 35. A plurality of batteries, as conventionally shown at 38 are also arranged within the box body. These batteries are connected in series and, as shown, one lead therefrom is secured to the binding 0st 36 while the other lead from the batteries is secured to the remaining terminal of the annuncipost 35. Mounted upon the inner ator 37. Thus, the inner and outer walls of the box body are in circuit with the batteries and with the annunciator so that should the door 27 of the box be opened, in an attempt to tamper with the box, the spring contact 30 will, upon engagement thereof with the contact 29, close the circuit and sound the annunciator. Similarly, mutilation of the box such as would cause bridging of the circuit between said walls would also, of course, result in sounding an alarm. As will thus be seen, this modified construction provides an arrangement wherein warning w1ll be given of any attempt to disable'the annunciator.

Havin thus described the invention, what is'elaime as new is:

1. In a grating for window openings, the combination with a wall provided with a window opening havin a sill, of vertically spaced transverse re s extending from lside to side of said opening and permanently secured at their ends to said wall, hollow vertical barssustained by said rods in fixed position within the opening and extendin at their lower ends through said sill, a con uit embedded in said wall beneath the sill and having the barsconnected thereto with their lower ends communicating with the interior of the conduit, a conductor extending longitudinally through said .conduit and having branch conductors extending u wardl into said bars, and means normal y insu ating said'conductor and its branches with respect to the conduit andsaid bars 2. In a window guard construction, the combination with a wall provided with a window opening havin end, a hollow conduit 0 conductive material embedded in the wall beneath the sill and ex; tending in the direction of the width of the window, hollow bars of conductive material dis osed vertically in the window ope an passed through openings formed vertically in said sill and attached at their lower ends to said conduit in spaced relation to each other longitudinally of the .conduiti a sill at its lower said bars having their lower ends open an communicating with the interior of said conduit, a conductor extending longitudinally through said conduit and insulated therefrom, branch arms extendin from said conductor into said bars, and co are of insulating material fitted about'said branch arms to insulate the same from the bars.

In testimony natures.

ANDREW P. KELLER. L. 5.} JOHN v. SCHLERETH, JR. 1. s.

whereof they aflix their sig- 

